Tieni sotto controllo eventuali blackout di corrente tramite eventi / controlli sul Raspberry Pi. https://gioxx.org

rpi_PowerCheck.sh

#!/bin/bash
# Electricity Power Check Script
# GSolone, 2022 - https://gioxx.org
#================================================================================
# Credits:
#		https://raspberrypi-guide.github.io/programming/run-script-on-boot
#		https://unix.stackexchange.com/a/616085
#		https://www.cyberciti.biz/faq/unix-linux-bash-script-check-if-variable-is-empty/
#		https://www.cyberciti.biz/tips/howto-linux-unix-write-to-syslog.html
#		https://askubuntu.com/a/77739
#================================================================================

powercheck=/home/pi/PWR_lastcheck.txt
notificationaddress=admin@contoso.com

BASHDATE=`date +"%b %d, %Y"`
BASHTIME=`date +"%T"`
TICK="[\e[32m ✔ \e[0m]"
ERROR="[\e[31m ✖ \e[0m]"
COL_NC="\e[0m" # No Color
COL_LIGHT_GREEN="\e[1;32m"
COL_LIGHT_RED="\e[1;31m"
VERSION="0.3 (20220629-02)"

case "$1" in
	help)
	scriptname=$(basename "$0")
	echo
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        ██░░░░░░░░░░░░░░████    ${COL_LIGHT_GREEN}Electricity Power Check Script ${VERSION}${COL_NC}
        ████████████████████    ${COL_LIGHT_RED}GSolone, 2022, https://gioxx.org${COL_NC}
      ████▓▓██░░░░██▓▓██░░░░██ (Toad Ascii Art made by textart.sh)
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    echo
    echo -e "${COL_LIGHT_GREEN}Electricity Power Check: Is there power in the house?${COL_NC}"
    echo -e "This script save (via crontab) the latest date and time when power is available in the house."
    echo -e "Checking RPi uptime, you can obtain an email notification and verify how many minutes (hours/days/etc) the power was not available (when uptime is not greater than XX mins)."
    echo
		echo -e "\033[1mHow to use\033[0m"
		echo -e "  Modify $scriptname and change 'powercheck' (absoute path where you want to save PWR_lastcheck.txt file) and 'notificationaddress' (email address to notify when Raspberry Pi reboots) vars. Save and exit."
		echo -e "  chmod +x $scriptname"
		echo
		echo -e "\033[1mSchedule $scriptname\033[0m"
		echo -e "  Manual Execution (not recommended): ${COL_LIGHT_GREEN}./$scriptname${COL_NC} (to execute and save last check file, $powercheck)"
		echo -e "  Automatic Execution (recommended): use crontab, ${COL_LIGHT_GREEN}0 */5 * * * /ABSOLUTE/PATH/WHERE/FIND/$scriptname${COL_NC}"
		echo
		;;
		clean)
		rm $powercheck
		echo -e " ${TICK} \e[32m Log deleted \e[0m"
		;;
		*)
		echo Power available on ${BASHDATE} at ${BASHTIME}. > $powercheck
		upSeconds="$(cat /proc/uptime | grep -o '^[0-9]\+')"
		upMins=$((${upSeconds} / 60))
		if [ "${upMins}" -gt "5" ]
		then
				echo -e " ${TICK} \e[32m Up for ${upMins} minutes. \e[0m"
		else
			echo -e " ${ERROR} \e[31m Up 5 minutes or less, send notification ... \e[0m"
			while [ "$(hostname -I)" = "" ]; do
				echo -e " ${ERROR} \e[31m No network, wait 1s. \e[0m"
				sleep 1
			done
			echo -e " ${TICK} \e[32m I have network, send notification now! \e[0m"
			lastcheck=$(<"$powercheck")
			if [ -z "$notificationaddress" ]
			then
				echo -e "Email address not specified, log to /var/log/messages"
				logger "RPi Startup on ${BASHDATE} at ${BASHTIME}. Latest electricity power check on $lastcheck. Uptime: ${upMins}."
			else
				echo -e "RPi Startup on ${BASHDATE} at ${BASHTIME}\nLatest electricity power check on $lastcheck.\nUptime: ${upMins}." | mail -s "RPi3-Startup alert" $notificationaddress
			fi
		fi
		echo -e " ${TICK} \e[32m Last check on ${BASHDATE} at ${BASHTIME} \e[0m"
		exit 0
		;;
esac